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International Journal of Trend in Scientific Research and Development (IJTSR) JournalsUploaded by siddharth garaniya on
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Out of
order arrival of packets is an inevitable phenomenon on the Internet.
Application performance can degrade to a great extent due to out-of-order
arrival of packets Packet reordering is a common phenomenon on the Internet.
Moreover, it is handled transparently from the user and application-level
processes. In this paper, we propose a novel covert channel technique using
the packet reordering phenomenon as a host for carrying secret
communications. This makes it an attractive medium to exploit for sending
hidden signals to receivers by dynamically manipulating packet order in a
network flow. In our approach, specific permutations of successive packets
are selected to enhance the reliability of the channel, while the frequency
distribution of their usage is tuned to increase stealthiness by imitating
real Internet traffic. It is very expensive for the adversary to discover the
covert channel due to the tremendous overhead to buffer and sort the packets
among huge amount of background traffic. A simple tool is implemented to
demonstrate this new channel. We studied extensively the robustness and
capabilities of our proposed channel using both simulation and
experimentation over large varieties of traffic characteristics. The
reliability and capacity of this technique have shown promising results. We
also investigated a practical mechanism for distorting and potentially
preventing similar novel channels. M. Gokul Narayanan | PS. Lokesh | N.
Kanimozhi"Practical data hiding technique in Covert timing
channels" Published in International Journal of Trend in Scientific
Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-2 ,
February 2018, URL: http://www.ijtsrd.com/papers/ijtsrd10777.pdf Article URL: http://www.ijtsrd.com/engineering/computer-engineering/10777/practical-data-hiding-technique-in-covert-timing-channels/m-gokul-narayanan |
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